Psychologist and cognitive scientist Steven Pinker at Harvard University thinks it is completely conceivable that wars between countries might go the way of slave auctions, debtors’ prisons and other barbaric customs.

He argues that while there is plenty of violence around the world, and more ways of killing each other, we have witnessed fewer and fewer wars between countries since 1945. Not only, is war is at an all-time low, rates of homicide are far lower than they were in the Middle Ages, and issues like domestic violence are no longer seen as being acceptable.

There are some parts to the brain that impel us to carry out violence, such as the thirst for revenge, feelings of tribalism, or the quest for dominance. But packed into the same skull there are motives that inhibit us from violence, like empathy and reason that allow us to see violence as a problem to be solved instead of a contest to be won.

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